Strong Modulation of Absorption and Third-Harmonic Generation in Resonant Metasurfaces based on VO2

Margherita Marni, Domenico de Ceglia

2021

Abstract

Control of linear and nonlinear optical signals is of key importance in a variety of applications, including signal processing, optical computing and energy harvesting, to name just a few. Optical modulation and switching, and more generally tunability in photonic devices, are usually achieved in the visible and near-infrared range by carrier injection, chemical or mechanical activation, or by deploying materials with large electro-optic or optical nonlinear coefficients. However, these mechanisms are inherently weak and therefore require intense control signals in order to produce significant modulation effects. Here we adopt a nanophotonic solution in which a resonant film of a volatile phase-change material, vanadium dioxide, is inserted between an array of antennas and a metallic backplane. Our design takes advantage of (i) the large refractive-index change of VO2 at its insulator-to-metal transition and (ii) the field enhancements available when the Fabry-Pérot resonance of the film and the plasmonic resonance of the antennas are exited. In response to the VO2 phase transition, not only does our metasurface provide a strong and broadband modulation of linear absorption and reflection but it also shows a drastic variation of third-harmonic generation, with a conversion-efficiency contrast higher than three orders of magnitude.

Paper Citation

in Harvard Style

Marni M. and de Ceglia D. (2021). Strong Modulation of Absorption and Third-Harmonic Generation in Resonant Metasurfaces based on VO2.In Proceedings of the 9th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-492-3, pages 40-45. DOI: 10.5220/0010340000400045

in Bibtex Style

@conference{photoptics21,
author={Margherita Marni and Domenico de Ceglia},
title={Strong Modulation of Absorption and Third-Harmonic Generation in Resonant Metasurfaces based on VO2},
booktitle={Proceedings of the 9th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2021},
pages={40-45},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0010340000400045},
isbn={978-989-758-492-3},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 9th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Strong Modulation of Absorption and Third-Harmonic Generation in Resonant Metasurfaces based on VO2
SN - 978-989-758-492-3
AU - Marni M.
AU - de Ceglia D.
PY - 2021
SP - 40
EP - 45
DO - 10.5220/0010340000400045